/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.writelog;

import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import org.apache.iotdb.db.conf.IoTDBConstant;
import org.apache.iotdb.db.conf.IoTDBDescriptor;
import org.apache.iotdb.db.utils.EnvironmentUtils;
import org.apache.iotdb.db.writelog.manager.MultiFileLogNodeManager;
import org.apache.iotdb.db.writelog.node.ExclusiveWriteLogNode;
import org.apache.iotdb.db.writelog.node.WriteLogNode;
import org.apache.iotdb.jdbc.Config;
import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class IoTDBLogFileSizeTest {

  private boolean skip = true;

  private int groupSize;
  private long runtime = 600000;

  private String[] setUpSqls = new String[]{"SET STORAGE GROUP TO root.logFileTest.seq",
      "SET STORAGE GROUP TO root.logFileTest.unsequence",
      "CREATE TIMESERIES root.logFileTest.seq.val WITH DATATYPE=INT32, ENCODING=PLAIN",
      "CREATE TIMESERIES root.logFileTest.unsequence.val WITH DATATYPE=INT32, ENCODING=PLAIN",
      // unsequence baseline
      "INSERT INTO root.logFileTest.unsequence(timestamp,val) VALUES (1000000000, 0)"};

  private String[] tearDownSqls = new String[]{"DELETE TIMESERIES root.logFileTest.*"};

  @Before
  public void setUp() throws Exception {
    if (skip) {
      return;
    }
    groupSize = TSFileDescriptor.getInstance().getConfig().getGroupSizeInByte();
    TSFileDescriptor.getInstance().getConfig().setGroupSizeInByte( 8 * 1024 * 1024);
    IoTDBDescriptor.getInstance().getConfig().setMemtableSizeThreshold(8 * 1024 * 1024);
    EnvironmentUtils.closeStatMonitor();
    EnvironmentUtils.envSetUp();
    executeSQL(setUpSqls);
  }

  @After
  public void tearDown() throws Exception {
    if (skip) {
      return;
    }
    TSFileDescriptor.getInstance().getConfig().setGroupSizeInByte(groupSize);
    IoTDBDescriptor.getInstance().getConfig().setMemtableSizeThreshold(groupSize);
    executeSQL(tearDownSqls);
    EnvironmentUtils.cleanEnv();
  }

  @Test
  public void testSeqFile() throws InterruptedException {
    if (skip) {
      return;
    }
    final long[] maxLength = {0};
    Thread writeThread = new Thread(() -> {
      int cnt = 0;
      try {
        Class.forName(Config.JDBC_DRIVER_NAME);
      } catch (ClassNotFoundException e) {
        e.printStackTrace();
        return;
      }

      try (Connection connection = DriverManager
          .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
          Statement statement = connection.createStatement()) {
        //System.out.println("Exit after " + cnt + " insertion");
        while (!Thread.interrupted()) {
          String sql = String.format(
              "INSERT INTO root.logFileTest.seq(timestamp,val) VALUES (%d, %d)", ++cnt,
              cnt);
          statement.execute(sql);
          WriteLogNode logNode = MultiFileLogNodeManager.getInstance().getNode(
              "root.logFileTest.seq" + IoTDBConstant.SEQFILE_LOG_NODE_SUFFIX);
          File bufferWriteWALFile = new File(
              logNode.getLogDirectory() + File.separator + ExclusiveWriteLogNode.WAL_FILE_NAME);
          if (bufferWriteWALFile.exists() && bufferWriteWALFile.length() > maxLength[0]) {
            maxLength[0] = bufferWriteWALFile.length();
          }
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    });
    writeThread.start();
    Thread.sleep(runtime);
    writeThread.interrupt();
    while (writeThread.isAlive()) {

    }
  }

  @Test
  public void testUnsequence() throws InterruptedException {
    if (skip) {
      return;
    }
    final long[] maxLength = {0};
    Thread writeThread = new Thread(() -> {
      int cnt = 0;
      try {
        Class.forName(Config.JDBC_DRIVER_NAME);
      } catch (ClassNotFoundException e) {
        e.printStackTrace();
        return;
      }
      try (Connection connection = DriverManager
          .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
          Statement statement = connection.createStatement()) {
        //System.out.println("Exit after " + cnt + " insertion");
        while (!Thread.interrupted()) {
          String sql = String
              .format("INSERT INTO root.logFileTest.unsequence(timestamp,val) VALUES (%d, %d)",
                  ++cnt, cnt);
          statement.execute(sql);
          WriteLogNode logNode = MultiFileLogNodeManager.getInstance()
              .getNode("root.logFileTest.unsequence" + IoTDBConstant.UNSEQFILE_LOG_NODE_SUFFIX);
          File WALFile = new File(
              logNode.getLogDirectory() + File.separator + ExclusiveWriteLogNode.WAL_FILE_NAME);
          if (WALFile.exists() && WALFile.length() > maxLength[0]) {
            maxLength[0] = WALFile.length();
          }
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    });
    writeThread.start();
    Thread.sleep(runtime);
    writeThread.interrupt();
    while (writeThread.isAlive()) {

    }
  }

  private void executeSQL(String[] sqls) throws ClassNotFoundException {
    Class.forName(Config.JDBC_DRIVER_NAME);
    try (Connection connection = DriverManager
        .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
        Statement statement = connection.createStatement()) {
      for (String sql : sqls) {
        statement.execute(sql);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}
